Specialized metallurgical processes – compositions for use therei – Processes – Electrothermic processes
Patent
1986-03-18
1987-02-17
Rosenberg, Peter D.
Specialized metallurgical processes, compositions for use therei
Processes
Electrothermic processes
75 511, 75 512, C21C 700
Patent
active
046437665
ABSTRACT:
An improved two phase basic steel refining process for phosphoric pig iron is described which comprises forming a steel having a phosphorus content of not greater than 0.025% by using a substantially stoichiometric amount of lime to neutralize silicon and phosphorus oxides formed during the refining process or contained in the mineral and metallic additions to form dicalcium silicate and tricalcium phosphate, adding all of the basic slag obtained at the end of the previous second phase in the first phase along with at most 25% of the fresh lime required, and blowing at least 80% of the total amount of oxygen required for refining during the first blowing phase followed by a thorough deslagging and entry into the second phase wherein at least 75% of the total quantity of lime is added and the remainder of the oxygen is blown, after blowing of the remaining oxygen, the hot molten slag containing bath is strongly stirred with a stirring gas and the resulting steel having a phosphorus content of not greater than 0.025% is tapped and the remaining slag is available for recycling.
REFERENCES:
patent: 3282679 (1966-11-01), Richter
patent: 4439234 (1984-03-01), Schleimer et al.
501 Societe Lorraine de Laminage & Continu -Sollac-
502 Unimetal
Rosenberg Peter D.
LandOfFree
Process for refining phosphoric pig iron does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process for refining phosphoric pig iron, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for refining phosphoric pig iron will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1935901